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  • Springer  (318)
  • Oxford University Press  (56)
  • American Society of Hematology  (39)
  • Deutsches GeoForschungsZentrum GFZ
  • 2000-2004  (416)
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Publisher
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Year
  • 11
    Unknown
    Social movements : identity, culture, and the state (2002)
    Oxford ; New York : Oxford University Press
    Details
    Keywords: Mouvements sociaux. ; Social movements.
    Notes: pt. I. Introduction. Opportunities and identities: bridge-building in the study of social movements / David S. Meyer -- pt. II. States and policies. State repression and democracy protest in three southeast Asian countries / Vincent Boudreau -- Mobilization on the South African gold mines / T. Dunbar Moodie -- Multiple meditations: the state and the women's movements in India / Manisha Desai -- The contradictions of gay ethnicity: forging identity in Vermont / Mary Bernstein -- Creating social change: lessons from the civil rights movement / Kenneth T. Andrews -- pt. III. Organization and strategies. The "meso" in social movement research / Suzanne Staggenborg -- Strategizing and the sense of context: reflections on the first two weeks of the Liverpool docks lockout, September-October 1995 / Colin Barker and Michael Lavalette -- Factions and the continuity of political challengers / Mildred A. Schwartz -- More than one feminism: organizational structure and the construction of collective identity / Jo Reger -- The development of individual identity and consciousness among movements of the left and right / Rebecca E. Klatch -- pt. IV. Collective identities, discourse, and culture. Toward a more dialogic analysis of social movement culture / Marc W. Steinberg -- Materialist feminist discourse analysis and social movement research: mapping the changing context for "community control" / Nancy A. Naples -- From the "beloved community" to "family values": religious language, symbolic repertoires, and democratic culture / Rhys H. Williams -- External political change, collective identities, and participation in social movement organizations / Belinda Robnett -- pt. V. Conclusion. Meaning and structure in social movements / Nancy Whittier
    Pages: xvi, 366 p.
    ISBN: 0-19-530277-X
    URL: http://www.netLibrary.com/urlapi.asp?action=summary&v=1&bookid=129231
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  • 12
    Electronic Resource
    Electronic Resource
    Further evidence for a Jurassic mineralizing event in central Europe: K–Ar dating of hydrothermal alteration and fluid inclusion systematics in wall rocks of the Käfersteige fluorite vein deposit in the northern Black Forest, Germany (2000)
    Springer
    Mineralium deposita 35 (2000), S. 754-761 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The hydrothermal fluorite vein deposit of `Käfersteige' ranks among the biggest in central Europe. It is located along the suture zone that separates the Moldanubian and Saxothuringian units in the northern Black Forest, and is hosted in Bunter sandstone and underlying granitic basement. K–Ar ages of authigenic illite from the wall rocks give a Jurassic formation age of around 145 Ma for the deposit. Age data scatter down to 80 Ma in illite from the clay gouge and indicate a younger Cretaceous-Tertiary hydrothermal overprint. The pyrophyllite component in authigenic illite from wall rocks and the re-equilibration of illite suggest a formation temperature around 200 °C. Secondary fluid inclusions in quartz from the wall rocks define a syn-mineralization fluid episode involving Ca–Mg–K–Na–Cl-rich brines (about 27 wt% NaCleq) with a T h of about 125 °C, and a post-mineralization Na–Cl-rich fluid overprint with a T h of about 100 °C. Both generations of fluid inclusions relate to the final event of each cycle, while authigenic illite composition and re-equilibration of illite in the clay gouge may document initial temperatures of formation. The Upper Jurassic fluid system can be traced all over western Europe. It is probably an expression of continent-wide rifting and concomitant regional fluid circulation in connection with major tectonic disturbances, magmatism and abnormal heat flow during the opening of the North Atlantic ocean. The younger barren fluid overprint could be related to the onset of the Alpine orogeny.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001260050277
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  • 13
    Electronic Resource
    Electronic Resource
    Muscle cells in the tiny marine Antarctic mite Halacarellus thomasi : an ultrastructural and immunocytochemical study (2000)
    Springer
    Polar biology 23 (2000), S. 759-765 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract All musculature examined in the tiny, 0.3-mm, marine Antarctic mite Halacarellus thomasi (i.e. body and appendages) appeared ultrastructurally to be of the transversely striated type with continuous Z-lines. Tubules of sarcoplasmic reticulum lay among the myofibrils. The complexity of the sarcotubular system, sarcomere lengths of over 6 μm, and the abundance of mitochondria are interpreted as signs that the mite is slow moving, but capable of considerable and sustained contraction forces, features deemed necessary in the strong currents of the frigid water prevailing in the mite's habitat. Presence and distribution of regulatory (troponin, tropomyosin, caldesmon and calponin), contractile (actin, myosin, paramyosin and miniparamyosin) and structural (alpha-actinin, titin, minititin and nebulin) proteins were determined immunocytochemically. The results are consistent with the notion of a well-functioning contractile machinery but, furthermore, provide evidence for the great importance of the structural proteins alpha-actinin, minititin and nebulin in maintaining muscle-cell stability under the environmental conditions in which the mite has to function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003000000149
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  • 14
    Electronic Resource
    Electronic Resource
    Feeding ecology and emergence production of annual cicadas (Homoptera: Cicadidae) in tallgrass prairie (2000)
    Springer
    Oecologia 123 (2000), S. 535-542 
    Details
    ISSN: 1432-1939
    Keywords: Key words Insect emergence ; Grassland ; Nutrient flux ; Resource partitioning ; Stable isotopes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The emergence phenology and feeding ecology of annual cicadas in tallgrass prairie are poorly documented. However, these large insects are abundant, and their annual emergence represents a potentially important flux of energy and nutrients from belowground to aboveground. We conducted a study at Konza Prairie Research Natural Area in eastern Kansas to characterize and quantify cicada emergence and associated energy and nutrient fluxes. We established emergence trap transects in three habitat types (upland prairie, lowland prairie, and riparian forest), and collected cicadas every 3 days from May to September. A subset of trapped cicadas was used for species- and sex-specific mass, nutrient, and stable isotope analyses. Five species were trapped during the study, of which three were dominant. Cicadetta calliope and Tibicen aurifera exhibited significantly higher emergence production in upland prairie than in lowland prairie, and were not captured in forested sites at all. T. dorsata emerged from all three habitat types, and though not significant, showed a trend of greater abundance in lowland grasslands. Two less abundant species, T. pruinosa and T. lyricen, emerged exclusively from forested habitats. Nitrogen fluxes associated with total cicada emergence were estimated to be ∼4 kg N ha–1 year–1 in both grassland habitats, and 1.01 kg N ha–1 year–1 in forested sites. Results of stable isotope analyses showed clear patterns of resource partitioning among dominant cicada species emerging from grassland sites. T. aurifera and C. calliope had δ13C and δ15N signatures indicative of feeding on shallowly rooted C4 plants such as the warm-season grasses dominant in tallgrass prairie ecosystems, whereas T. dorsata signatures suggested preferential feeding on more deeply rooted C3 plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004420000335
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  • 15
    Electronic Resource
    Electronic Resource
    The origin of fluids and nature of fluid–rock interaction in mid-crustal auriferous mylonites of the Renco mine, southern Zimbabwe (2000)
    Springer
    Mineralium deposita 35 (2000), S. 109-125 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Geothermometric constraints on auriferous shear zones of the Renco mine in the Northern Marginal Zone of the late-Archaean, granulite-facies Limpopo Belt in southern Zimbabwe indicate that deformation and associated mineralization occurred at temperatures of at least 600 °C up to more likely 700 °C. Mid- to upper-amphibolite facies conditions during mineralization correspond to the regional-scale retrogression of granulite facies wall rocks during the late-Archaean thrusting of high-grade metamorphic rocks of the Northern Marginal Zone onto low- to medium-grade granite-greenstone terrains of the Zimbabwe craton. Mineral assemblages indicate that the ore fluid was moderately oxidized with log fO2 values between 10−17 and 10−18 bars with high H2S activities of 0.25–0.75. Elements enriched in the shear zones include Au, S, Fe, Cu, Mo, Bi, Te, Ni, Co, and H2O, Au and Cu being the most enriched. Geochemically, Au correlates with Cu but not with S, which, together with the fact that gold is only rarely intergrown or in direct contact with sulfides, possibly indicates a transport of gold as a chloride complex. The siting of gold along fractures or within implosion breccias suggests that gold was precipitated due to fluid immiscibility induced by catastrophic fluid pressure drops during seismic slip events. Fluid inclusions are predominantly CO2 (±CH4 ± N2)-rich, but petrographic work indicates that fluid inclusions have undergone extensive post-entrapment modifications due to the pervasive recrystallization of mineral textures in the high-temperature shear zones. The mineralized shear zones are enriched in 18O compared to wall-rock enderbites, which is interpreted to represent an influx of externally derived fluids of probably metamorphic origin. Based on temporal and spatial relationships between mineralization, late-Archaean overthrusting of the Northern Marginal Zone onto the Zimbabwe craton, and coeval amphibolite-facies hydration of granulites, we suggest that the Renco mineralization formed in a mid-crustal environment from metamorphic fluids that were generated from dehydration of subcreted greenstone terrains of the Zimbabwe craton.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001260050010
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  • 16
    Electronic Resource
    Electronic Resource
    Structural controls of lode-gold mineralization by mafic dykes in late-Paleozoic granitoids of the Kochkar district, southern Urals, Russia (2000)
    Springer
    Mineralium deposita 35 (2000), S. 157-168 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The Kochkar gold district in the East Uralian Zone of the southern Urals is located in late-Paleozoic granite gneisses of the Plast massif. Gold mineralization is associated with tabular quartz lodes that are preferentially developed along the margins of easterly trending mafic dykes. Fabric development indicates that dykes had a profound influence on the development of shear zones in granitoids. ENE- and SE-trending dykes have been reactivated as dextral and sinistral oblique strike-slip shear zones, respectively, forming a set of approximately conjugate shear zones related to the Permian, regional-scale E-W directed shortening. Dyke-shear zone relationships in the Plast massif are the result of strain refraction due to the presence of biotite-rich, incompetent dykes in more competent granite-gneisses. Deformation and the formation of associated gold-quartz lodes occurred close to peak-metamorphic, upper-greenschist to lower-amphibolite facies conditions. Strain refraction has resulted in partitioning of the bulk strain into a component of non-coaxial mainly ductile shear in mafic dykes, and a component of layer-normal pure shear in surrounding granitoids where deformation was brittle-ductile. Brittle fracturing in granitoids has resulted in the formation of fracture permeabilities adjacent to sheared dykes, that together with the layer-normal dilational component, promoted the access of mineralizing fluids. Both ore-controlling dykes and gold-quartz lodes were subsequently overprinted by lower greenschist-facies, mainly brittle fault zones and associated hydrothermal alteration that post-date gold mineralization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001260050013
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  • 17
    Electronic Resource
    Electronic Resource
    The Presence of GSI-Like Genes in Higher Plants: Support for the Paralogous Evolution of GSI and GSII Genes (2000)
    Springer
    Journal of molecular evolution 50 (2000), S. 116-122 
    Details
    ISSN: 1432-1432
    Keywords: Key words: Gene families — Glutamine synthetase —Medicago truncatula— Phylogeny
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. Glutamine synthetase type I (GSI) genes have previously been described only in prokaryotes except that the fungus Emericella nidulans contains a gene (fluG) which encodes a protein with a large N-terminal domain linked to a C-terminal GSI-like domain. Eukaryotes generally contain the type II (GSII) genes which have been shown to occur also in some prokaryotes. The question of whether GSI and GSII genes are orthologues or paralogues remains a point of controversy. In this article we show that GSI-like genes are widespread in higher plants and have characterized one of the genes from the legume Medicago truncatula. This gene is part of a small gene family and is expressed in many organs of the plant. It encodes a protein similar in size and with between 36 and 46% amino acid sequence similarity to prokaryotic GS proteins used in the analyses, whereas it is larger and with less than 25% similarity to GSII proteins, including those from the same plant species. Phylogenetic analyses suggest that this protein is most similar to putative proteins encoded by expressed sequence tags of other higher plant species (including dicots and a monocot) and forms a cluster with FluG as the most divergent of the GSI sequences. The discovery of GSI-like genes in higher plants supports the paralogous evolution of GSI and GSII genes, which has implications for the use of GS in molecular studies on evolution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002399910013
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  • 18
    Electronic Resource
    Electronic Resource
    Molecular Characterization of STAT5A- and STAT5B-Encoding Genes Reveals Extended Intragenic Sequence Homogeneity in Cattle and Mouse and Different Degrees of Divergent Evolution of Various Domains (2000)
    Springer
    Journal of molecular evolution 50 (2000), S. 550-561 
    Details
    ISSN: 1432-1432
    Keywords: Key words: STAT5 — Mammary gland factor — Bovine — Murine — Gene structure — Gene conversion — Domains — Transcription factors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. The STAT transcription factors form a family of signal transducers and activators of transcription. We sequenced the bovine STAT5B cDNA and both STAT5-encoding genes, STAT5A and STAT5B, representing the first complete description of any STAT5-encoding gene. DNA fiber FISH hybridization revealed that the genes reside only 40 kbp apart on BTA19. Both genes are segmented into 19 exons and all but two of the homologous exons are of equal size. The genes harbor a central block of nearly identical DNA sequence (97.5% sequence identity over 3373 bp), spanning from intron 5 to intron 9. Isolation and sequencing of the homologous segments from mouse revealed the same unusually high degree of intronic sequence conservation in these segments of the murine STAT5-encoding genes. However, the respective sequences are completely divergent between the two species. A comparison of the inter- and intragenic cDNA sequence preservation at nonsynonymous sites reveals that the DNA-binding domain is under the strongest selection pressure for both intergenic and factor-specific intragenic sequence preservation. The so-called ``SH3'' segment of the linker domain, in contrast, shows species-specific sequence identity in all but one amino acid residues in both factors, in cattle, human, and mouse. This indicates that the same species-specific selection pressure occurs on the linker domain from both factors, STAT5A and STAT5B. Thus, the comparison of evolutionary selection pressures resting on various domains suggests that the DNA-binding domain might contribute to differential DNA binding of STAT5A and STAT5B factors, while both might interact equally well with other cellular factors through a segment of the linker domain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002390010058
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  • 19
    Electronic Resource
    Electronic Resource
    Processing and properties of 15–70 MHz 1–3 PZT fiber/polymer composites (2000)
    Springer
    Materials research innovations 3 (2000), S. 324-331 
    Details
    ISSN: 1433-075X
    Keywords: Keywords 1–3 Composite ; Piezoelectrics ; Fiber composite ; High frequency transducers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  This paper reports on the fabrication and characterization of fine scale piezoelectric composites with 1–3 connectivity using fibers derived from a metal alkoxide sol-gel process. Using this technique, pure thickness mode resonance for this type of composite has been increased from 15 MHz up to 70 MHz by maintaining pillar aspect ratio requirements. Piezoceramic fibers of Nb or La modified lead zirconate titanate (PZT) were produced with final diameters ranging from 15 to 50 µm. Composites having 1–3 connectivity were produced using the fibers as pillars. Composites could be fabricated with volume fractions from 10 to 45% allowing tailoring of both the dielectric constant and acoustic impedance without degrading coupling. Dielectric constant, polarization and coercive field values varied slightly from bulk values due to clamping by the polymer matrix, increasing as the fiber diameter decreased. Composites with resonance frequencies ranging from 15 to 70 MHz were studied. The thickness dependence of the properties gave indications to radial mode/thickness mode interactions at pillar aspect ratios near 1.7 to 1 thickness to diameter. Coupling coefficients (kt) from 58% to 73% with mechanical quality factors 〈15 were detected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100190000060
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  • 20
    Electronic Resource
    Electronic Resource
    Intracolonial demography of the mound-building termite Macrotermes natalensis (Haviland) (Isoptera, Termitidae) in the northern Kruger National Park, South Africa (2000)
    Springer
    Insectes sociaux 47 (2000), S. 390-397 
    Details
    ISSN: 1420-9098
    Keywords: Key words: Termite colonies, caste composition, Termitida, Macrotermes natalensis, Kruger National Park.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: This paper reports on the number of individuals in Macrotermes natalensis (Hav.) colonies of different sized mounds in the northern Kruger National Park. Mounds were fully excavated, termites collected by means of vacuuming, and colony size estimated by sub-sampling. The proportion of termites in the mound (above and underground sections) amounts to more than 70 % of the colony; the rest being present in the surrounding soil (excavated beyond mound perimeter). It was estimated that, on average, small mounds contain more than 5000, medium mounds more than 45000, and large mounds more than 200000 individual termites. A highly significant relationship between total individuals (N) and mound height (h) was found, given by lnN = 7.893 + 1.093h (r = 0.92). Highly significant correlations (r s 〉 0.90) were found between and within caste numbers, and their respective ratios given. The proportion of soldiers was found to change as colonies grew larger.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00001736
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